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| author | David Ayers <d.ayers@inode.at> | 2005-12-15 17:46:17 +0100 |
|---|---|---|
| committer | David Ayers <ayers@gcc.gnu.org> | 2005-12-15 16:46:17 +0000 |
| commit | bf5b295c6ae0da86f24a4646d0552d3b5ce8bbb3 (patch) | |
| tree | 16c60e929c53e436e23b2c78fdaee6226742efbe /libobjc/README | |
| parent | e6add59b161628111dff015502f88d6459927493 (diff) | |
| download | gcc-bf5b295c6ae0da86f24a4646d0552d3b5ce8bbb3.zip gcc-bf5b295c6ae0da86f24a4646d0552d3b5ce8bbb3.tar.gz gcc-bf5b295c6ae0da86f24a4646d0552d3b5ce8bbb3.tar.bz2 | |
re PR libobjc/14382 ([libobjc] Calling +initialize on a per category basis)
2005-12-15 David Ayers <d.ayers@inode.at>
PR libobjc/14382
* README (+load,+initialize): Fix documentation to reflect
intended and implemented semantics for +load and +initialize.
From-SVN: r108584
Diffstat (limited to 'libobjc/README')
| -rw-r--r-- | libobjc/README | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/libobjc/README b/libobjc/README index f478d67..093116f 100644 --- a/libobjc/README +++ b/libobjc/README @@ -39,19 +39,26 @@ adopts it -- it is not enough to inherit them. The flag `-Wprotocols' is the default which requires them defined. ++load +=========== +This method, if defined, is called for each class and category +implementation when the class is loaded into the runtime. This method +is not inherited, and is thus not called for a subclass that doesn't +define it itself. Thus, each +load method is called exactly once by +the runtime. The runtime invocation of this method is thread safe. + + +initialize =========== This method, if defined, is called before any other instance or class -methods of that particular class. This method is not inherited, and -is thus not called as initializer for a subclass that doesn't define -it itself. Thus, each +initialize method is called exactly once (or -never if no methods of that particular class is never called). -Besides this, it is allowed to have several +initialize methods, one -for each category. The order in which these (multiple methods) are -called is not well defined. I am not completely certain what the -semantics of this method is for other implementations, but this is -how it works for GNU Objective C. +methods of that particular class. For the GNU runtime, this method is +not inherited, and is thus not called as initializer for a subclass that +doesn't define it itself. Thus, each +initialize method is called exactly +once by the runtime (or never if no methods of that particular class is +never called). It is wise to guard against multiple invocations anyway +to remain portable with the NeXT runtime. The runtime invocation of +this method is thread safe. Passivation/Activation/Typedstreams |